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On the use of the dimethyl terephthalate/dimethyl isophthalate recrystallization residue as a raw material in the production of solid polyurethane foams with reduced flammability
Author(s) -
Troev K.,
Todorov K.,
Borisov G.
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070290212
Subject(s) - dimethyl terephthalate , polyurethane , flammability , materials science , residue (chemistry) , peroxide , dimethyl phthalate , phthalic acid , polymer chemistry , recrystallization (geology) , catalysis , organic chemistry , chemical engineering , composite material , chemistry , polyester , phthalate , paleontology , engineering , biology
Abstract The residue from the recrystallization of the dimethyl terephthalate/dimethyl isophthalate fraction consists mainly of the dimethyl esters of the phthalic acids (ca. 82–85%) and about 15% aldehydes. It is shown that the isophthalic fraction affords the hydroxyl group containing phosphonates on treatment with diethyl phosphite in the presence of alkaline or peroxide catalysts. The residue treated in this manner can be used for preparing oligoester alcohols and solid polyurethane foams from them with reduced flammability.